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81:9= 9reszty 0
62:8= 7reszty 6
a) 6x8+3x4= 48+12=60
b)16x(8+2)= 16x10=160
c) 160:(40x2)+15 160:80+15= 2+15=17
d) 50-2 do potęgi 2 x8= 50-4x8=50-38=12